Monday's session looked constructive at the open — SPY reached 745.34 and QQQ tagged 723.02 — but the tape gave it all back and more, with both closing flat to fractionally negative versus Friday. The story wasn't the closes; it was the range reversal and the options flow underneath it: three consecutive 0DTE SPX put sweeps totaling $593M in premium hit between 7430 and 7450 strikes, all classified bearish bets, while AAPL collapsed 4.8% to 300.96, dragging QQQ off its highs.
Going into Tuesday, SPY sits just below its 740 call wall with net GEX deeply negative at -$8.30B and trend bias confirmed bearish. The key question is whether the 0DTE pinning effect fades now that Monday's cycle rolls off, or whether the institutional put flow from today signals more sustained downside pressure through the week.
GEX walls are price levels where dealers hedge aggressively. Price tends to gravitate toward Max Pain and stall near walls.
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